Mold, Podcast

326// Mold Test Kit 101: How to Test Your Home & Body

July 23, 2026

Mold Test Kit 101: How to Test Your Home & Body

If you've been dealing with mystery symptoms...

Fatigue.

Brain fog.

Digestive issues.

Hormone problems.

Anxiety.

Skin rashes.

Headaches.

…and you've started wondering whether mold could be involved...

You're probably asking yourself one simple question:

"How do I know if I'm actually sick from mold?"

It's a great question.

It's also where most people go wrong.

Instead of getting answers, they spend months—or years—bouncing between specialists, trying supplements, changing diets, and ordering tests that never tell the full story.

I've watched it happen hundreds of times.

Here's the good news.

You do NOT need a dozen expensive labs.

You don't need to test everything under the sun.

And you definitely don't need to guess.

After helping more than 150 clients navigate mold illness, I've found that nearly everyone can begin with just two simple tests.

One tells you whether your body is dealing with mold.

The other tells you whether your home is keeping you sick.

That's it.

Let's walk through both.


Why Most Mold Testing Misses Toxic Mold Exposure

One of the biggest myths I hear is this:

"My doctor tested me for mold and said everything was normal."

Maybe.

But what kind of mold test did they run?

That question changes everything.

Most conventional doctors order a mold allergy test.

Sometimes it's a blood test.

Sometimes it's a skin prick panel.

Neither one tells you whether you have toxic mold exposure.

Instead, they measure something completely different.

They measure an allergic immune response.

Mold Allergies Are Not Mold Illness

A mold allergy involves a specific immune pathway called IgE.

IgE reactions include symptoms like:

  • Sneezing
  • Watery eyes
  • Itchy skin
  • Hives
  • Swelling
  • Asthma symptoms
  • Severe allergic reactions

Those reactions are real.

But they are not the same thing as mold illness.

Many people who suffer from black mold or toxic mold exposure have completely normal allergy testing.

That's because they aren't reacting to mold as an allergen.

They're reacting to something much more dangerous.


Mycotoxins: The Real Reason Mold Makes So Many People Sick

When certain molds grow, they release poisonous compounds called mycotoxins.

These toxins affect nearly every system in the body.

That's why mold symptoms seem so random.

One person develops migraines.

Another develops anxiety.

Someone else struggles with constipation.

Or insomnia.

Or chronic fatigue.

Or autoimmune symptoms.

The list goes on.

That doesn't make mold impossible to diagnose.

It simply means symptoms alone aren't enough.

I've seen people chase:

  • Lyme disease
  • Parasites
  • Heavy metals
  • Hormone imbalances
  • Gut infections
  • Food sensitivities

...only to discover later that mold was quietly driving everything.

That's why I don't rely on symptoms.

I rely on testing.


Stop Guessing—Answer These Two Questions First

Whenever someone starts their mold healing journey, I ask two questions.

Question #1

Is my body sick from mold?

Question #2

Is my home making me sick?

Notice the order.

Most people immediately jump to their house.

They buy a home mold test.

Or they search online for:

  • mold testing near me
  • mold inspection
  • mold detection services
  • mold test kit
  • mold home test kit

But here's the problem.

If mold isn't affecting your body...

Testing your home won't change your health.

I prefer starting with the body first.

It's usually faster.

It's often less expensive.

And it tells us whether mold belongs in your healing plan at all.


The Best Mold Test for Your Body Isn't a Blood Test

This surprises almost everyone.

When I evaluate someone for mold exposure, I don't start with blood work.

I use an Organic Acids Test (OAT).

Specifically...

I recommend the Organic Acids Test from Mosaic Diagnostics (formerly Great Plains Laboratory).

After comparing multiple versions over the years, this remains my preferred option.

Here's why.


Why I Love the Organic Acids Test

This test checks far more than mold.

That makes it one of the highest-value functional medicine labs available.

Instead of spending hundreds of dollars on separate testing, one urine sample provides a tremendous amount of information.

It evaluates markers connected to:

  • Mold
  • Yeast overgrowth
  • Candida
  • Bacterial overgrowth
  • Clostridioides difficile (C. diff)
  • Oxalates
  • Mitochondrial function
  • Neurotransmitter metabolism
  • Nutrient status
  • Energy production

That's incredibly valuable.

Because mold rarely shows up alone.

When someone has chronic mold illness, I often see additional root causes hiding underneath.

The Organic Acids Test helps uncover those connections.

How do you test for mold? Get my favorite mold test kit picks for your home and body—and what to do if your mold test comes back positive.

False Negatives: When Mold Is Still There but the Test Looks Normal

Now, let's talk about one of the biggest objections I hear.

"What if my Organic Acids Test comes back normal?"

That's an important question.

Because a "normal" result doesn't always mean mold isn't involved.

It could.

But it could also mean your body isn't eliminating mold well enough for it to show up in your urine.

This is where many practitioners stop.

I don't.

Your Body Has to Eliminate Mold Before It Can Be Measured

Remember what the Organic Acids Test measures.

It doesn't measure mold sitting inside your tissues.

It measures what your body is successfully detoxifying.

Think about it like this.

Imagine your kitchen sink.

If the drain is completely clogged, the water doesn't disappear.

It stays in the sink.

Your detox pathways work similarly.

If your body's drainage systems are overwhelmed, mold toxins can remain inside your tissues instead of showing up in your urine.

That's one reason some practitioners criticize urine-based mold testing.

They're right about one thing.

Urine only reflects what leaves the body.

But here's where I disagree.

That doesn't make the Organic Acids Test useless.

Far from it.


The Organic Acids Test Has Built-In Clues Most People Miss

This is why I continue recommending the Organic Acids Test as the best first step.

Most practitioners only look at the mold page.

I look at the entire lab.

Other sections often reveal patterns that point back to mold, even when the primary mold markers appear normal.

Those secondary markers can tell us:

  • Your detox pathways need support.
  • Your mitochondria are under stress.
  • Oxidative damage is occurring.
  • Mold may still be playing a role.

In other words...

The Organic Acids Test gives us more than one opportunity to identify mold-related dysfunction.

That's incredibly valuable.

It's also why interpretation matters.

Reading functional medicine labs isn't about circling red numbers.

It's about recognizing patterns.

That's where many people get stuck trying to interpret results alone.


Mold Exposure vs. Mold Colonization: They're Not the Same Thing

This is one of the most important distinctions I teach.

Most people think these are identical.

They aren't.

Mold Exposure

Exposure means you've encountered mold.

Maybe it happened:

  • At work
  • In an apartment
  • During college
  • In a previous home
  • Inside your current house

Exposure alone doesn't tell us whether mold is still affecting you today.

Mold Colonization

Colonization means mold has moved beyond simple exposure.

It has begun living inside your body.

When mold colonizes, it can continue producing harmful compounds long after the original exposure.

That's why some people leave a moldy building...

…and still don't recover.

Their environment changed.

Their body didn't.

The Organic Acids Test helps identify whether mold has become part of your internal environment.

That's a completely different question than simply asking whether you once lived in a moldy home.


How do you test for mold? Get my favorite mold test kit picks for your home and body—and what to do if your mold test comes back positive.

Healing Mold Means Healing More Than Mold

Here's another mistake I see all the time.

People become laser-focused on mold.

They assume removing mold fixes everything.

Sometimes it does.

Often it doesn't.

Because mold rarely travels alone.

When the immune system stays overwhelmed for months or years, other problems often develop.

I regularly see clients with combinations like:

  • Mold and Candida
  • Mold and parasites
  • Mold and bacterial overgrowth
  • Mold and food sensitivities
  • Mold and mineral deficiencies
  • Mold and impaired detoxification

This is exactly why I don't believe in chasing symptoms one at a time.

I believe in restoring the entire body.

That's also why I appreciate the Organic Acids Test.

It provides clues about many of these overlapping issues from one collection.


When Your Organic Acids Test Is Positive, Your Next Step Is Simple

Once we know your body is dealing with mold, we ask the second question.

"Where is the mold coming from?"

This is where many people immediately search for:

  • mold testing near me
  • mold inspection companies
  • home mold testing
  • mold detection
  • mold home test kit

Before hiring anyone, I recommend starting with one specific test.


The Best Home Mold Test I Recommend

The first home mold test I recommend is called an ERMI.

ERMI stands for:

Environmental Relative Moldiness Index.

Don't worry.

You don't need to memorize that.

Just remember the acronym.

ERMI.

Unlike many mold test kit options sold online, the ERMI doesn't rely on air sampling.

That's important.

Air testing only captures what's floating through the room during a brief moment.

But mold isn't always floating around.

Sometimes spores settle into dust for months.

That's where the ERMI shines.


How an ERMI Mold Test Works

People are often surprised by how simple this mold home test kit really is.

You aren't collecting air.

You're collecting dust.

Specifically, older dust.

The dust hiding in places you rarely clean.

For example:

  • Top edges of picture frames
  • Ceiling fan blades
  • Tops of cabinets
  • Window trim
  • Behind furniture
  • TV tops
  • Door frames

The test uses a collection cloth similar to a Swiffer pad.

You wipe the recommended locations.

Mail the sample.

Then the laboratory analyzes the DNA of mold spores trapped in that dust.

That's what makes the ERMI so powerful.

Instead of guessing...

It identifies which mold species are present.

And how elevated they are.


Not All Mold Is Created Equal

This is another myth that causes confusion.

People often ask,

"Does any mold mean I have to move?"

No.

Every home contains some mold.

That's normal.

Our goal isn't zero mold.

Our goal is low mold, especially low levels of the species known to produce the most harmful mycotoxins.

The ERMI doesn't simply tell you mold exists.

It tells you:

  • Which species are present
  • How elevated they are
  • Whether your home's overall mold burden deserves further investigation

That's a huge difference from basic mold detection tools that only tell you moisture exists.


Why I Recommend an ERMI Before Hiring a Mold Inspector

Many homeowners spend thousands of dollars too early.

They call an inspector.

The inspector searches room by room.

Maybe they find something.

Maybe they don't.

Instead, I like answering one simple question first.

"Is this house likely contributing to my illness?"

The ERMI helps answer that.

If your ERMI looks clean, wonderful.

You've ruled out one major concern.

If it comes back elevated, now it's worth bringing in a qualified mold inspector.

That creates a much smarter—and often much less expensive—plan.

Instead of guessing, you're making decisions based on data.

And that's exactly how I approach functional medicine.


Learn More About Healing Mold at the Root

If your Organic Acids Test suggests mold is affecting your body, don't stop at testing.

The goal isn't simply to collect information.

The goal is to recover your health.

Inside the Better Belly Blueprint, you'll learn how to:

  • Order the Organic Acids Test at near-wholesale pricing.
  • Interpret your results step by step.
  • Identify additional root causes hiding alongside mold.
  • Build a personalized protocol based on your lab findings.
  • Understand when home testing and remediation become necessary.

Rather than piecing together advice from dozens of websites, you'll have one proven system that walks you through each stage of healing.

What to Do After a Positive ERMI Test

So your home mold test came back positive.

Now what?

First...

Don't panic.

I know that's easier said than done.

Finding out your home may be contributing to your illness feels overwhelming.

For many people, it feels like betrayal.

Home is supposed to be your safe place.

It's where you sleep.

Recover.

Spend time with your family.

The thought that it could be making you sick is emotional.

I've walked hundreds of clients through this exact situation.

Here's what I want you to remember:

A positive ERMI is information—not a life sentence.

It tells you where to focus your energy.

That's empowering.


The ERMI Doesn't Tell You Where the Mold Is

This is one of the biggest misunderstandings about the ERMI.

It answers one question:

"Does my home have an elevated mold burden?"

It does not answer:

  • Which wall contains mold
  • Which bathroom is leaking
  • Whether it's under your flooring
  • Whether it's behind drywall

That's the next step.

If your ERMI suggests a problem, hire a qualified mold inspector who understands mold illness—not just building codes.

A great inspector may use:

  • Moisture meters
  • Thermal imaging
  • Humidity measurements
  • Targeted sampling
  • Visual building assessments

Their goal is to identify the moisture source that's allowing mold to grow.

Remember:

Mold is a moisture problem first.

Remove the moisture source.

Then remove the contaminated materials.


Can You Skip the ERMI?

Sometimes.

If you can already see visible black mold, you probably don't need a screening test.

For example, maybe you're remodeling your kitchen.

You remove the flooring.

Underneath sits obvious mold from a slow refrigerator leak.

At that point...

You already have your answer.

The priority becomes safe remediation.

Not more testing.


Please Don't DIY Major Mold Remediation

I know YouTube makes everything look easy.

This isn't the project I'd recommend tackling yourself if you're already sick.

Every time contaminated drywall, flooring, or insulation gets disturbed, mold spores can spread throughout the house.

That can increase mold exposure dramatically.

Instead, work with experienced professionals who understand containment and proper remediation practices.

Then focus your energy where it matters most:

Healing your body.


Healing Your Body Requires Healing Your Environment

This is the lesson many people learn the hard way.

They buy supplements.

Binders.

Detox products.

Expensive protocols.

Yet they continue sleeping in the same moldy environment.

Imagine trying to empty a bathtub...

While the faucet stays on.

That's what healing feels like when mold exposure continues every day.

You cannot out-supplement ongoing exposure.

Your environment matters.

That's why I always encourage clients to answer both questions:

Is my body sick from mold?

Is my home keeping me sick?

When you answer both, your healing becomes much clearer.


Don't Waste Money Chasing the Wrong Tests

The functional medicine world offers dozens of mold labs.

Conventional medicine offers allergy testing.

The internet offers countless mold test kits, mold home test kits, and home mold tests.

It's easy to become overwhelmed.

If you're just beginning your mold journey, simplify it.

Here's the sequence I recommend:

Step 1

Determine whether your body shows evidence of mold using the Organic Acids Test (OAT).

Step 2

If your results suggest mold involvement, evaluate your home using an ERMI.

Step 3

If your ERMI is elevated, locate the source with a qualified mold inspector.

Step 4

Remediate the moisture problem correctly.

Step 5

Support your body's healing using a personalized protocol based on your complete lab findings—not guesswork.

Simple.

Strategic.

Effective.


You Don't Have to Figure This Out Alone ❤️

One of the hardest parts of mold illness isn't the testing.

It's wondering whether you're making the right decisions.

Should you move?

Should you remediate?

Should you detox first?

Should you test more?

I've seen people spend tens of thousands of dollars because they received poor advice.

I don't want that to be your story.

That's exactly why I created the Better Belly Blueprint.

Inside the program, you'll learn how to:

  • Order practitioner-grade functional labs.
  • Understand your results with confidence.
  • Follow step-by-step healing protocols.
  • Learn when mold is truly the root cause.
  • Avoid unnecessary testing and wasted money.
  • Heal your body from the inside out.

If you're ready to stop guessing and finally build a clear roadmap, learn more about the Better Belly Blueprint.

You can also explore our complete mold podcast series for even deeper education on mold testing, remediation, detoxification, and recovery.

Your body wants to heal.

Sometimes it simply needs the right information—and the right plan.


Quick Recap

✅ Don't rely on mold allergy testing alone.

✅ Mold allergies and mold illness are different conditions.

✅ Mycotoxins—not allergies—often drive chronic symptoms.

✅ The Organic Acids Test is my preferred first test for evaluating whether your body is dealing with mold.

✅ The Organic Acids Test measures metabolites that suggest mold colonization and provides valuable insight into other root causes.

✅ A normal Organic Acids Test doesn't always rule out mold, especially if detox pathways are impaired.

✅ If your body shows evidence of mold, evaluate your home with an ERMI.

✅ An ERMI helps determine whether your home has an elevated mold burden.

✅ If the ERMI is positive, work with a qualified mold inspector to locate the moisture source.

✅ Healing mold requires healing both your body and your environment.


Frequently Asked Questions

How do I know if mold is making me sick?

Symptoms alone aren't enough to diagnose mold illness. Functional testing, such as the Organic Acids Test, can help determine whether mold is contributing to your symptoms.


Is a mold allergy test enough?

No. Mold allergy testing evaluates an IgE allergic response. Many people with mold illness have normal allergy tests because they're reacting to mycotoxins rather than an allergy.


What's the best home mold test?

I recommend an ERMI as a starting point. It analyzes mold DNA in household dust and provides a much more comprehensive picture than many basic mold test kit options.


Can I have mold illness even if I don't see mold?

Yes. Hidden mold behind walls, under flooring, inside HVAC systems, or beneath sinks is common. Many homes with elevated ERMI scores show no obvious signs of visible mold.


Should I test my body or my house first?

Start with your body. If testing suggests mold involvement, then evaluate your home. That sequence often saves both time and money.


About the Author

Written by Allison Jordan, FDN-P

Allison Jordan is a Functional Diagnostic Nutrition Practitioner and the founder of Better Belly Therapies. She has helped more than 150 clients uncover the hidden root causes behind chronic digestive issues, fatigue, mold illness, hormone imbalances, food sensitivities, and other complex health conditions. Through practitioner-grade lab testing and a root-cause approach, Allison teaches people how to stop guessing and finally understand what's keeping them sick.

How do you test for mold? Get my favorite mold test kit picks for your home and body—and what to do if your mold test comes back positive.
How do you test for mold? Get my favorite mold test kit picks for your home and body—and what to do if your mold test comes back positive.

 

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